From 6d3fbe919b839bae9d8ed22b4ae5a17b05cb209e Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 11 Mar 2020 10:04:26 +0100
Subject: pcmcia: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
drivers/pcmcia/yenta_socket.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
(limited to 'drivers/pcmcia/yenta_socket.c')
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 49b1c6a1bdbe..bf6529b0b5b0 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -180,12 +180,12 @@ static ssize_t show_yenta_registers(struct device *yentadev, struct device_attri
for (i = 0; i < 0x24; i += 4) {
unsigned val;
if (!(i & 15))
- offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
+ offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
val = cb_readl(socket, i);
- offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
+ offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
}
- offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
+ offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
for (i = 0; i < 0x45; i++) {
unsigned char val;
if (!(i & 7)) {
@@ -193,10 +193,10 @@ static ssize_t show_yenta_registers(struct device *yentadev, struct device_attri
memcpy(buf + offset, " -", 2);
offset += 2;
} else
- offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
+ offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
}
val = exca_readb(socket, i);
- offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
+ offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
}
buf[offset++] = '\n';
return offset;
--
cgit